Tokttji kawai



T. KAWAI. GAS PURIFYING APPARATUS.

APPLICATION FILED JAN. 18. I918- 1,304,884. Patented May 27,1919.

TOKUJI KAWAI, or 0NGA-GUN, FUKUOKA-KE1\T, JAPAN.

GAS-PURIFYING APPARATUS.

Specification of Letters'Patent.

Application filed January 18, 1918. Serial No. 212,477.

To all whomz't may concern:

Be it known that I, ToKUJI KAWAI, a subject of the Emperor of Japan, and a resident of No. 37 3-Chome, Takami-Cho, Aza Tsukita, Yawata-Machi, Onga-Gun, Fukuoka-Ken, Empire of Japan, engineer, have invented a new and useful Improvement in Gas-Purifying Apparatus, of which the following is a specification.

The present invention relates to a gas purifier having in its construction a preliminary dust cleaner made of two concentric cylinders consistingof an outer cylinder and an inner cylinder the latter of which is separated into two compartments by a partition in such a manner that a gas supplied to one of the compartments must be introduced to the other compartment through the under space of the partition, and a secondary dust cleaner formed of two concentric barrels consisting of an outer barrel and an inner barrel, between which barrels a helical passage is provided so that the gas flowing from the inner cylinders of the preliminary dust cleaner to the secondary dust cleaner ascends through the said helical passage, thence flowing back to thefouter cylin der of the preliminary dust cleaner through the inner'barrel, and'has for its object toobtain a'gas perfectly purified from any'impurities by means'ofprecipitation and washing, while the temperature lost by cooling water is therein restored. 7

Accompanying drawing illustrates the apparatus according to the invention, shown in longitudinal sectional elevation.

In two concentric cylinders consisting of an outer cylinder 1 and an inner cylinder 2 a partition 3 is suspended in theinner cylinder, by which the latter is separated into two compartments; agas from a cupola' or.

the like not shown in the drawing is introduoed through aninlet pipe 1 to the compartment of the inner cylinder, the inlet pipe being connected and secured to the said compartment, thence the gas flows to the other compartment through the under space ofthe partition, and from the latter to a secondary dust cleaner by a delivery pipe 5, thus completing the preliminary dust cleaner thereof. The concentric cylinders are inverted in a clinker built water tank 6 to-prevent the escape of the gas contained therein, so that crude dusts may beseparated and precipitated in the tank 6, thus enabling the pr-ecipitants to be removed without discontinuance of the operation.

The second dust cleaner comprises an outer barrel 7 and an inner barrel 8, a helical passage 10 being made between those two barrels by a diaphragm-plate 9. The lower end of the helical passage 10 is connected with the delivery pipe 5 while at upper endit is communicating with the up- Patented May 27, 1919. i

per end of the inner barrel 8. At 11 are represented water ejectors connected to a water pipe 12. The construction of these ej ectors is such that they may either take the form of a coiled pipe extending upwardly along the helical passage, not shown, or, as

illustrated, to take a form of a plurality of ejectorsbranched from the water pipe 12 and entering into each section so that the containing dusts may be washed by the ejecting water as the gas flows upwardly from the delivery pipe 5 to the top of the V helical passage 10.

The purified gas thus produced partially recovers its temperature, while it is passed through a return pipe 13, connecting the inner barrel 8 with the outer cylinder 1, to the space between the latter and the inner cylinder 2, where the gas is reheated to be used for any desired purpose, and it delivers from 'a' supply pipe 14. The dust eliminated in; barrel 7'comes downwith the water and is discharged tothe inside of'a tank 16 built of clinker, having dipped into the water contained in the said tank the lower end of a discharge pipe 15 so as to prevent the escape of gas therefrom; a scavenging hole 17 is made in'the bottom of the inner barrel 8.

for the purpose of drainage, and besides a gas discharge valve 18 fitted on the topof the inner barrel, there is a manhole'serving for cleaning purpose.

' What I claim is V ,In an apparatus of the character desc'ribed,'the combination of a primary gas and dust separator comprising two concentrically arranged cylinders, a partition in the inner cylinder dividing the same into two compartments, and a cleanser juxtaposed to said separator and connected with the same, said cleanser comprising two concentrical barrels separated by a helical rated from the gas, substantially as depassage, and Water sprinklers in said passcribed. 1O sage, a pipe connecting the inner barrel In testimony whereof I affix my signature with said helical passage, and a return pipe in presence of two Witnesses.

connecting the-inner barrel With the outer TOKUJ I KAWVAI. cylinder of the primary separator, and dust lVitnesses:

collecting tanks below said cylinders and H. F. HAWLEY,

said barrels for collecting the dust sepa- H. YosUMUo.

Copies of this patent may be obtained'for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

